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Discussion on: How can you swap two variables without using a third?

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Replies for: That's a good one. Although it won't work in Javascript I think. x=10;y=5;console.log(x,y);(x=(x-(y = (x=x+y)-y)));console.log(x,y)

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Sergiu Mureşan • • Edited

I think it doesn't like the double assignment on same expression. In JS you can do:

[a, b] = [b, a];

or

b = [a, a = b][0];

although less readable.

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Nick Karnik •

[] allocates new space I think so this solution won't be in constant space.